Machine for decreasing the sizes of rings.



-E. T. GOLDBERG & A. GALBORD.

MACHINE FOR DECREASING THESIZES 0F RINGS.

APPLICATION. FILED NOV. 13. 1915.

2 SHEETS-SHEET I. 1

WITNESSES:

ATTORNEY T'IE COLUMBIA PLANCIGRAPH co.. WASHINGTON. u. c.

Patented June 13, 1916.

v E. T. GOLDBERG & A. GALBORD. MACHINEFOR DECREASING THE SIZES 0F RINGS.

I APPLICATION FIL'ED NOV-13. 1915. 2' 1,187,140. Patented June 13, 1916.

' 2 SHEETS-SHEET 2 -|NVENTOR5.

ELIAS T. GOLDBERG AND AARON GALBORD, 0F BRIDGEPORT, CONNECTICUT.

MACHINE FOR DECREASING THE SIZES OF RINGS.

Specification of Letters Patent.

Patented June 13, 1916.

Application filed November 13, 1915. Serial No. 61,357.

To all "whomc't may concern:

Be it known that we, ELIAS T. GOLDBERG,-

a citizen of the United States of America, and AARON GALBORD, a subject of the Czar of Russia, both residing at Bridgeport, Fairfieldcounty, Connecticut, have invented certain new and useful Improvements in Machines for Decreasing the Sizes of Rings, of which the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to certain improvements in machines for altering the sizes of rings, such machines being particularly designed for the use of jewelers, either for the purpose of increasing or decreasing the sizes of rings, or for the purpose of initially bending and forming straight or partially bent bars or blanks into ring shape preparatory to soldering and polishing.

Our machine in its preferred form embodies in its construction instrumentalities for increasing the sizes of rings, for decreasing such sizes, and for bending and forming into a complete circlet partially formed rings or straight blanks that have previously been cut preparatory to shaping into ring form.

\Vhile we have shown in the accompanying drawings our machine as it appears when fully equipped for performing these several operations above referred to, the present application will be confined to our invention only in so far as it is utilized for the purpose of decreasing the sizes of rings, while the means which we have shown for increasing the sizes of rings and for shaping partially formed rings or blanks for rings, will be made the subjects of separate applications, to be filed on even date herewith.

ith these ends'in view our invention consists in certain details of construction and combination of parts such as will be hereinafter described in detail and then particularly pointed out in the claims which conclude this description.

In the accompanying drawings Figure 1 is a front elevation, partly in section, of a machine embodying in its organization, our

present improvement, Fig. 2 is a detailplan view of the clamping device, Fig. 3 a detail elevation showmg a ring as it appears after a section thereof has been cut'out'for the purpose of decreasing the size of the ring,

and Fig. 4 is a vertical sectional view taken through the center of the machine. Similar numerals; of reference denote like parts in the several figures of the drawing.

1 is the frame of the machine.

3 is a shaft journaled within the uprights V 2, 4, which shaft forms a part of the organi zation of our machine when utilized for the purpose of increasing the sizes of rings, as is fully set forth in our pending application No. 61,356. a

5 is the clamping member having at the rear end a socket portion 6 which is loosely hung around the shaft 3, and this member consists of a flat plate extending substantially at right angles to the socket 6 and has an opening 7 to the rear wall of which is secured a stationary clamping jaw 8 composed of any suitable yielding material such as rubber, felt, &c., while slidably disposed within this opening in parallelism with the jaw 8 is a movable clamping jaw 9 which is likewise composed of any suitable flexible material and has a metal backing 10 to which is swiveled a clamping screw 11 which latter is driven through the front of the member 5, so that it will. be readily understood that the movements of this screw will cause the jaw'9 to approach or recede from the jaw 8. l

Secured to the side of the member 5 at its front is a bracket 12, and 13 is a screw whose lower extremity is driven into the frame of the machine and whose upper portion is so attached to thisbracket as to be incapable of lengthwise movement with respect thereto, so that it will be clear thatthe operation of this screw 13 will cause the clamping member to be moveddownwardly or upwardly as the case may be.

14c is a supporting pin secured to the upper face of the member 5 and projecting forwardly beyond the front face of the jaw 8, so as to overhang the space between the jaws 8 and 9, which pin acts as the support for a ring in the manner hereinafter to be described. As a precaution against any ac- 2 and extending clear through the latter from the outer side face to the inner side face, and this bushing is elon ated and extends for a considerable distance beyond the outer side face of this upright 2 and has on its per'iphery marks of graduation.

16 is a sleeve which embraces the outer circumference of the bushing 15 and is capable of sliding movements therealong and has rigid therewith an interior screw threaded portion 17 which engages with threads on the interior of the bushing 15 the inner end of this screw threaded portion 17 being formed into an elongated pinion 18 which projects beyond the inner side face of the upright 2 so that it will be clear that when this sleeve is turned in either direction it will travel along the bushing 15 so that the inner edge of the sleeve will register with the marks of graduations on the bushing and at the same time the pinion 18 will be drawn outwardly or projected inwardly as the case may be.

19 is a shaft one end of which is ournaled within the upright 4 while the other end is slidably journaled within the pinion 18 the latter being hollow for this purpose. To the end of this shaft 19 at the inner face of the upright 4: is secured a small gear wheel 20 which is in mesh with a large gear wheel 21 mounted on a short shaft 22 that is journaled within the upright 4 the outer extremity of this shaft 22 being provided with an angular portion 23 so that any suitable crank may be removably attached thereto for the purpose of revolving the gear 21 on the shaft 19 at a comparatively high rate of speed. In case a motor should be employed for the purpose of revolving this shaft 22 we have provided a pulley 2 1 which is fixed on said shaft; it will therefore be possible to revolve this shaft either by power or by hand.

Splined on the shaft 19 so as to revolve therewith and at the same time be capable of lengthwise movement along said shaft are saw carriages 25 to whose inner extremities are secured circular saws 26, these saws being provided with teeth not only on their circumferences but on their'outer side faces, the teeth on said faces being disposed on a bevel in order that these saws may make a proper cut in the manner hereinafter to be described.

27 is a rod whose extremities are suitably journaled within the uprights 2, 1, and which is provided with right and left hand threaded portions, and these portions engage the lower extremities of gage blocks 28 the upper portions of these blocks loosely embracing reduced portions of the parts 25, so that it will be clear that these blocks will not interfere with the rotary movements of these parts and-that as the blocks approach or recede from each other they will carry with them the parts and consequently the saws.

29 is a gear wheel fixed to one end of the rod 27 and meshing with the elongated pinion 18, so that when this pinion is revolved by the turning of the sleeve 16 the rod 27 will likewise be revolved whereby the lead screws thereon will operate to separate the saws or to bring them together in abutment, as may be desired.

The operation of our improvement is as follows :We will presuppose that a ring of a certain size is to be made smaller to any degree. The particular size desired will be indicated on the bushing 15 by means of any suitable graduations and the sleeve 16 is then operated until it registers with the particular size desired, and this movement of the sleeve will cause the separation of the saws 26 to the extent that corresponds exactly with the extent to which the sleeve has been moved. The ring to be decreased in size, which is denoted by the numeral 30, is

'placed between the clamping jaws 8, 9, so

as to be suspended from the pin 14, and the jaw 9 is operated by the screw 11 until the ring is firmly clamped; the screw 13 is then operated to lower the member 5 until the ring is brought into contact with the saws 26 and the latter are then revolved by the rotation of the shaft 22. During the revolution of the saws the screw'13 is from time to time operated to lower the member 5 until the ring has been entirely cut through with the severed ends on a slight bevel, whereupon the ring is removed from between the clamping jaws and will then be in the condition shown at Fig. 3 so that when the extremities are brought together in abutment they will fit together closely owing to their beveled condition so that they may be soldered and polished in the usual manner. The pin 14 is not absolutely necessary since it is merely a convenient fixture to hold the ring in position while the movable jaw is being operated to clamp the ring, and the ring may be lightly clamped at first so that when the screw 13 is operated to lower the member 5 the bottom of the ring will strike the saws and force the ring upwardly free of the pin 14, so as to leave a comparatively small part of the ring extending below the clamping jaws, thus enabling the ring to be held more firmly by the finalaction of the clamping jaws so that there will be less vibration of the ring during the operation of sawing.

The faces of the clamping jaws are made of flexible material so that the jaws can adapt themselves to the shape of any ring whether of uniform shape, tapered, or otherwise, irregular in contour.

It will thus be seen that the amount necessary to be cut from the ring, in order to reduce the latter to the proper size, is de- 1. A machine of the character described, comprising a rotary shaft, a pair of car-.

riages slidably mounted on said shaft and revolving therewith, saws fixed to said carriages in juxta-position with their inner sides facing each other, instrumentalities having a common axis with that of said saws and operable for determining spaced adjustments of the latter, devices operable to effect the spacing apart of said saws, connections intermediate said instrumentali ties and devices whereby said adjustments and spacing will be simultaneously effected, and means for revolving said saws.

2. A machine of the character described, comprising a rotary shaft, 3. pair of carriages slidably mounted on said shaft and revolving therewith, saws fixed to said carriages, a movable scale registering device concentric with said shaft, carriages and saws, connections between said carriages and devices whereby the movements of the latter will be communicated to said carriages, and means for revolving said shaft.

3. A machine of the character described, comprising a rotary shaft, a pair of carriages slidably mounted on said shaft and revolving therewith, saws fixed to said carriages, devices concentric with the axis of revolution of said saws for predetermining the operative positions of the saws, means actuated and controlled by said devices for adjusting the saws to said positions, and means for revolving said shaft.

4. A machine of the character described, comprising a rotary shaft, a pair of carriages slidably mounted on said shaft, and revolving therewith, saws fixed to said carriages, a hollow circular bushing secured to the frame of the machine and having a scale on its outer surface, rotary slidable devices supported by said bushing and adapted to register with said scale, connections between said carriages and devices whereby the sliding movements of the latter during such registration will be communicated to said carriages, and means for revolving said shaft. I

5. A machine of the character described, comprising a rotary shaft, a pair of car- Gopies of this patent may be obtained for riages slidably mounted on said shaft and revolving therewith, saws fixed to said carriages, gage blocks engaging said carriages, a rotary rod carrying a pinion and having right and left handed lead screws which are respectively engaged with threaded openings in the lower ends of said blocks, an elongated stationary bushing, a hollow elongated pinion meshing with said first named pinion and capable of rotation and longitudinal movements within said bushing and within whose interior said shaft is slidably supported, and a rotary element surrounding said bushing and having a screw threaded connection therewith and rigid with said elongated pinion as to rotary and length-. wise movements.

6. A machine of the character described, comprising a rotary shaft, a pair of carriages slidably mounted on said shaft and revolving therewith, saws fixed to said carriages, gage blocks engaging said carriages, a rotary rod carrying a pinion and having right and left hand lead screws which are respectively engaged with threaded openings in the lower ends of said blocks, a stationary scale bearing bushing secured to the frame of the machine, a rotary sleeve loosely surrounding said bushing and having a screw thread connection therewith whereby said sleeve maybe slidably adjusted with respect to said scale, connections between said sleeve and pinion whereby said rod will be revolved simultaneously with the sleeve to space the saws to a degree indicated by said scale, and means for revolving said shaft.

7 In a machine of the character described, a pair of rotary saws suitably mounted, means concentric with said saws for predetermining the operative positions of the latter, devices operated by said means for automatically adjusting said saws to different parallel planes to vary the spaced relation between the planes of the side faces of said saws whereby the cutting of the latter will be effected in parallel planes that are side by side in spaced relation, and means for revolving said saws.

In testimony whereof we aflix our signatures in presence of two witnesses.

ELIAS T. GOLDBERG. AARON GALBORD.

Witnesses:

F. W. SMITH, Jr., M. T. LONGDEN.

five cents each, by addressing the Commissioner or Patents, Washington, .D. C." I 

